30780442 has 16 divisors (see below), whose sum is σ = 57563712. Its totient is φ = 11992320.

The previous prime is 30780419. The next prime is 30780443. The reversal of 30780442 is 24408703.

It is a self number, because there is not a number n which added to its sum of digits gives 30780442.

It is not an unprimeable number, because it can be changed into a prime (30780443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99783 + ... + 100090.

It is an arithmetic number, because the mean of its divisors is an integer number (3597732).

Almost surely, 2^30780442 is an apocalyptic number.

30780442 is a deficient number, since it is larger than the sum of its proper divisors (26783270).

30780442 is a wasteful number, since it uses less digits than its factorization.

30780442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199893.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 30780442 is about 5548.0124369003. The cubic root of 30780442 is about 313.3946781455.

The spelling of 30780442 in words is "thirty million, seven hundred eighty thousand, four hundred forty-two".